Edging machine



A. E. MAYNARD ET AL EDGING MACHINE Filed Nov. 26, 1919 2 Sheets-Sheet 2 INVENTORS WAGUNNENG AE. MAYNARD ATTORNEYS ALBERT E. Mnvnannann WILLIAM A. eulvivine, or, souiHBit 'nengiaessaciiusnturs,- ASSIGNORS TO AMERICAN orTIcAL coMrANY, A vonun ran z nssocra'rion .oF1

this purpose. T V

nnerne MAcHInn;

Applicationfiledvlfovember 26,1919. seen as. 340,733.?

To all wkom it may concern: v 1

1 Be it known that We,.A1,BnR'r E..MAYNARD V and I WILLIAM V A; GUNNING, citizens 'ofzthe United States; residing; at Southbridge, tin the county o fFNorcesterand State otMasSa-f chusetts, have invented certain new and use-- ful linproveinents'frin Edging Machines, of which the rfollowingris a specification This invention relates to improvements in edging machines, and has particular reference to an improved machinepar'ticularly adapted for use in the edging of ophthalmic lenses, Q 3 One of the leadingolojects of the present invention is the provision ot a noveliand improved means vfor transmitting the driv in'g power fromashigh speed shaft to the lens and stone shifting mechansimso that these partswill properly z-function a t desired low rates ofspeed.

Another object of the invention is the provision of a novel and improved manner of adjusting the stonethrow and "simplification of mechanlsin hitherto employed for" A further object-ofthe presentinvention is the provision or" an improved stonead justrnentmechanism in which ordinary-ad justinents may be readily made as desired a and in Which special adjustment oft-he" stone may he niade'f or honing orother pur poses 'ivhen unusually wide. or varied throw thereof is desired'.- f' I Other objectsof the invention include a simplification and improvement of the s'ev eral details of construction of a machine 'of this character and should }be readily apparent reference to the followingspecifl cation taken in connectionrwith the accompanying drawings, and it will be understood that We may make any modifications inthe':

specific-details: of construction shown and described Within the scope of the appended claims tvithout departing from -or exceeding the spirit of our invention. I ""1 t Figure I ,:represents a front perspective view'of a machine embodying our improve merits.

' FigureII representsa:fragmentarv plan View; thereofi possible: adjustments 'bein'g shown indotted'lines.

a Figure III represents a Tear-i perspective view wvithf'parts broken I v away to illustrate n e lo .ge 'me anismi- V Figure IV' represents a detail sectional vievvof the shift lever pivotstructureQ Inthe'idrawmgs, the-numeral l des gnates the base ofthe-imachinexprovided Withthe' hearings 21 01 the stone3," and havingpivot-" 4 ally mounted i thereon the carriage 4 having? the lens clamp spindles 6 and for securing in "pos tion-the lens 8 to beedged. 1

Povver' for rotation of the stonemay be appliedto the. stone shaft 9-{as "through the i pu-lle z 10 and drive. belt '11, "said I shaft: '9 being further provided" Wlthl the -s'procket;

12 for driving theisprocketchain l3ipassing over the second sprocket Wheel 14 which drives the shaft-15 at' the rear-of the machine. 1 This shaft 15 is; provided with the Worm 16"meshingviththe gear 17*on the forwardly extending shaft 18, which is *pro vide'dwith the secondworm 19 inmesh with the gear '20 on the shaft 2l5lwhich through suitable connection drives the gear-22 on the;

lens spindle or shaft 7,' and thusthe lens, the.

proper reduced speed-motion being thus suppliedifrom the rearshaft-lSto'the lens the' shaft-15' being-capable otheing driven either froin the grindstone shaft or r from an fin dependent source'of power, as preferred by the individual user..'

It is well known in -the practice"of edgingi that it is necessary for satisfactoryvvork to y relatively reciprocate L the 1 lens a and grind? stone to prevent the-glass from-wearing V away the stone ina circumferential 'groover of i the worin23 carried by the shaft 1 8 and meshing with the gear 2a 011' thevertical .;shaftf25 which bears. the'heart-shaped face 021111126 shift Collar 30, suitably'rotatably mounted 'onthe grindstone spindle '9', but held against endiv-ise movement thereon so that any"re In: the present instance wel 'a ve made-"use f V principle. of applying-the -lateral shifting movement to the "grindstone rather than to the lens carriage although thein'e'ch' r s so anisin .described' is equally capable of'eithe'r operation. Asillustrated'We have shown the ciprocating' movement applied "toilthe collar r i through the yoke will lo etransmitted to the grindstoneshaft and stone; To cause the cam 26 to reciprocate the stone W e suitably intermediately' pivot thelever tofthe'base 1. a T "t er re i his i stan s i h ve mole.

the dove tail slide groove 315 in which rides the slide 32 having pivotally mounted there '1 in the pin 33 transversely adjustable as by.

' the thumb nut 3 l;with,respect to the yoke 35"which-spans the shiftlever '28 and is pro- 'vided with the upstanding lugor portion 36' through.which passes the longitudinal adbracket members 38 on the lever 28.

it will: thus be seen and particularly un derstood by reference to Figure III of the drawings, that rotation of the screw 37 as by theknurled wheellor controlling disc 39 will *cause the bracket or yoke 35and thus thepin 33.:andslide32 to move along the slide way 31 and to holdthe pivot at different points along the shift. lever;v It will be. understood that inasmuch as the' pivot point is intermediate the-stone spindle engaging yoke at 'fithe one end of the lever and the'cam controlling the opposite end of thelever shiftin of theipivot longitudinally of the lever willivaryltlie amount of transverse slidingmovement'impartedto thestone for the fixed oriunvalyinginovement given the other end of the lever by the operatingcam. This is 'desirable,intheedging of lenses since the machine may be intended to edge but a sin .gle lens when it"is' preferred the lens travel i practically from edge to? edge over the stone 7 or'for adjustment ofthe throw so that. severallenses maybe edged'and the outermost lens at each 'side during the travel of the fistone'will come approximately to the. edge of l theistoneya-t that side but will not run off? the. stone. 7

At this point we would call fattention to thefact'that the clamping of the lenses between the spindles 6 and 7 is controlled by,

- the handlBdO which, slides'back thespindle 6-for insertion or removal of the lenses,

while the spindle --7 isheldagainst any lonallowance" in throwoof stone need only take.

gi-tudinal movement. The result of thisis that the .positionjof .the right hand lensin the machine is at all times constant and the into consideration thevarian'ce in position of'the left hand ens or l nses beingedged.

We have, therefore, particularly designed u qmao ine so that n pl of boththe right and l ft movements of the stone being varied by change in adjustment of the shift lever, as has been the case priorto our invention,- we maintain the right, hand 'posiion ofth stone constant and by shi g our 1 1m poin vary on y'theleft hand po iti n h ma nor n Whioh'th s resul is accomp ished may pe haps be best understood by efe ence to Figur II fr m which it will beis en that he guide-Way n pla eof b ing placedp ra el to the base 1 isdisp se a forwardly converg ng angle with respect to i lieflbaseiandgonoral plane' fthe-inaohine, Ehut that'this angle is so calculated as to be parallelto and preferablyin. alinement with the central portion of the shift lever over a no variation in the left shift of thestone; the variation all being its shift toward the right, as is indicated bythe two sets of dotted lines in Figure 11, showing the effect of the maximum and -minimum pivot adjustments as respects the throw toward the right," the throw toward the left remaining constant in the position indicated by the full lines I I It will be noted that carried at theb'ack of the frame isthe'hone 41 of 'suflic'ient width to attall times bear against the face of the stone and keep it in condition, and we have shown additionallythere disposed the tr'uing to more thoroughly true up the stone and 'sult of this positioningof the guide-way is that-irrespective of the adjustment of the 'pivotv33 along; the guide-way there will be devi-ce'42 normally operating on the face of'the stone and aiding in keeping it in conto make sure thetruing device 42 passes over the entire surface of the stone from edge to edge, andto accomplish this result we have provided the adjustment screw 34 for shifting the pivot transversely with respect to the, leverengaging yoke 35; in that by this temporary adjustment of the: pivot itispose sible to increase the movement'of the stone toward'the lever so that the truer may pass over the right hand edge of the stone, the

throw-being set substantially great so that the stone in the opposite direction will still pass over the other edge of the stone. This device, however, is required only for truing up a stone and is not needed inconnection with the regular edging operations although usable in these lfClQSlIBCl, as when one side ofthe stone is. wearing slightly more than the other and-it isdesired to use but onehalf or a'selecte'dportion of the width of the stone in place of the entire width when the pivot maybe'adjusted for the amount of throw desired by movement longitudinally in the guideway andmay then be transverse- 1y adjusted to'li'mit themovement to a certain portion ofthe: stone face; when it will have established a new lateral movementas re v spects the face of 'theistone regardless of furthellongitudinal movement ofthej pivot.

I .We claim:

i dging'maohine including abas s oI af d alei sholder mounted on the base, and means for relatively'laterally shifting one of the p rts wi h respect to the basai'i'neluding oo lo er having oneend attached toone of the parts, lnealls'iol. oscillating,the

opposite end of the lever, a pivot longitudimains a constant irrespective of longitudinal I adjustment of the pivotas respects the lever.

2. An edging machine including a lens j i holder and a stone for edging a lenswithin 10 the holder, one of saidmembers being later? ally shifting said member, a variable pivot for the rock lever and a guide along which the pivot moves, the guide being disposed diagonally as. respects the body of the machine, the angle of the guide'icorresponding with the, position of the'lever at the lim-itof throw infone' direction whereby adjustment of the pivot alongsaid angular guide-will varythe- *throw in one direction while, maintainlng it: constant in the opposite direction.

3. An' edging machine includinga lens holder and a-stone'for edginga lens within f the holder, one'of said members being later ally shiftahle, a cam and rocklever for lat erally shiftingsaid member,a variable pivot i 7 for'the rock lever and a guidealongwhich V the pivotmoves, the guide being disposed in angular relation to the body of themachine and corresponding with the position of the lever at the limit of throw. intone direction whereby adjustment of the pivot along said angular guide W111 vary the throw n one direction While maintainlng 1t constant in the opposite direction, and -means for laterally shifting the pivot as respects'the lever to change the normally fixed limit of throwl disposed-at right angles to the first two shafts and driven from the second, :said

shaft: q 5. In a device of the characterdescribed,

shaft projecting both forwardly and rear-f *wardlyof the other two shafts a lens car-9 riage' having driving-mechanism operable 1 from the forward portion of said third shaft, and stone reciprocating mechanism" operated f by the rearwardly projecting portion of-said y the combination with a frame of cooperat a V 7 ing lens holding and lens edging members ally shiftable, a cam and rock leverfor latercarriedthereby, one of said ,members; being laterally shlftable, and operable mechanism arm and longitudinally adjustable with I reand for the purpose described a 6-1 a m chine of the character described, i1' i i perating lenshOIdingandlenS' edging members carried there'by, and means;

spect thereto, atransversely adjustable depe'ndingfrom the yoke, a guide along the frame, and a; slide member movable on the 1, uide and'e-ngaging the pin, substantially as;

for laterally shifting one of said members including a guide carried by the frame, a a

block slidable on the guide and having apin 5 vreceivingaperture, a pinjournaled inthe japerture, a yoke, laterally adjustable connections between the pin and yoke, a rock arm mounted in the yoke and engaging the slidable block, and-means; for longitudinally shifting the yoke as respects the arm, the

bl'ock movingalong the guide during said ingfthe armfabout the pines a fulcrum. Intestimony whereof we have afliixed our.

. ignaturesfln' presence of two witnesses. I: p I,

" 1 ALBERT E; MAYNARD; v WILLIAM- GUNNING;

Witnesses: c I

ESTHER \M. Lumen, ALICE G. HAsKErL, j

v longitudinaladjustmentand meansfor rock-' v i 

